Add 72/84 and 7/40
72/84 + 7/40 is 289/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
72/84 = 72 × 10/84 × 10 = 720/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
7/40 = 7 × 21/40 × 21 = 147/840 - Add the two like fractions:
720/840 + 147/840 = 720 + 147/840 = 867/840 - 867/840 simplified gives 289/280
- So, 72/84 + 7/40 = 289/280
In mixed form: 19/280
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